test/clang-tidy/checkers/bugprone-misplaced-operator-in-strlen-in-alloc.cpp

// RUN: %check_clang_tidy %s bugprone-misplaced-operator-in-strlen-in-alloc %t

namespace std {
typedef __typeof(sizeof(int)) size_t;
void *malloc(size_t);

size_t strlen(const char *);
} // namespace std

namespace non_std {
typedef __typeof(sizeof(int)) size_t;
void *malloc(size_t);

size_t strlen(const char *);
} // namespace non_std

void bad_std_malloc_std_strlen(char *name) {
  char *new_name = (char *)std::malloc(std::strlen(name + 1));
  // CHECK-MESSAGES: :[[@LINE-1]]:28: warning: addition operator is applied to the argument of strlen
  // CHECK-FIXES: {{^  char \*new_name = \(char \*\)std::malloc\(}}std::strlen(name) + 1{{\);$}}
}

void ignore_non_std_malloc_std_strlen(char *name) {
  char *new_name = (char *)non_std::malloc(std::strlen(name + 1));
  // CHECK-MESSAGES-NOT: :[[@LINE-1]]:28: warning: addition operator is applied to the argument of strlen
  // Ignore functions of the malloc family in custom namespaces
}

void ignore_std_malloc_non_std_strlen(char *name) {
  char *new_name = (char *)std::malloc(non_std::strlen(name + 1));
  // CHECK-MESSAGES-NOT: :[[@LINE-1]]:28: warning: addition operator is applied to the argument of strlen
  // Ignore functions of the strlen family in custom namespaces
}

void bad_new_strlen(char *name) {
  char *new_name = new char[std::strlen(name + 1)];
  // CHECK-MESSAGES: :[[@LINE-1]]:20: warning: addition operator is applied to the argument of strlen
  // CHECK-FIXES: {{^  char \*new_name = new char\[}}std::strlen(name) + 1{{\];$}}
}

void good_new_strlen(char *name) {
  char *new_name = new char[std::strlen(name) + 1];
  // CHECK-MESSAGES-NOT: :[[@LINE-1]]:20: warning: addition operator is applied to the argument of strlen
}

class C {
  char c;
public:
  static void *operator new[](std::size_t count) {
    return ::operator new(count);
  }
};

void bad_custom_new_strlen(char *name) {
  C *new_name = new C[std::strlen(name + 1)];
  // CHECK-MESSAGES: :[[@LINE-1]]:17: warning: addition operator is applied to the argument of strlen
  // CHECK-FIXES: {{^  C \*new_name = new C\[}}std::strlen(name) + 1{{\];$}}
}